Powder-based solid cosmetic composition and preparation process thereof

ABSTRACT

A powder-based solid cosmetic composition is provided having a hardness not greater than 75 as measured by an Asker hardness tester type C1L, a porosity of at least 0.4 and an impact resistance of at least 5. A process is also provided for making the powder-based solid cosmetic composition. The composition according to the present invention has excellent skin feel upon use and is not easily broken.

BACKGROUND OF THE INVENTION

[0001] 1. Field of the Invention

[0002] The present invention relates to a powder-based solid cosmeticcomposition which has excellent skin feel upon use and is not brokeneasily by an external force.

[0003] 2. Description of the Related Art

[0004] A powder-based solid cosmetic composition is generally preparedby a press molding method, wherein a raw material composition in acontainer is solidified by compaction. However, typical powder-basedsolid cosmetic compositions are poorly bound together, i.e., have poorpowder-powder binding power, owing to a relatively small content of anoil component. As a result, high pressure is required to press-mold thesolid composition, and the resultant product is necessarily hard and ispowdery to the touch.

[0005] Generally, the lower the hardness of a powder-based solidcosmetic composition, the lower the powder-powder binding power, and theproduct is easily broken by an external force.

[0006] On the other hand, a solvent method is known which includesmixing a cosmetic composition with a low-boiling-point organic solvent,filling the resulting mixture in the form of a slurry into a container,and then solidifying the composition by removing the solvent (JapanesePatent Application Laid-Open No. Sho 56-108703). Although the solventmethod is advantageous because the mixture can be uniformly filled intothe container, several problems are associated with the solvent method:shrinkage or cracks appear during drying owing to the evaporation of alarge amount of the solvent from the slurry, the filling has a tendencyto break, and caking occurs after molding.

SUMMARY OF THE INVENTION

[0007] Accordingly, one object of the present invention is to provide apowder based solid cosmetic composition which has excellent skin feelupon use and is resistant to cracks.

[0008] The present inventors have found that a powder-based solidcosmetic composition which has excellent skin feel upon use and isresistant to cracks is available by adjusting each of its hardness,porosity and impact resistance to a predetermined value.

[0009] One embodiment of the present invention provides a powder-basedsolid cosmetic composition having a hardness not greater than 75 asmeasured by an “Asker rubber hardness meter type C1L”, a porosity of atleast 0.4 and an impact resistance of at least 5.

[0010] Another embodiment provides a process for the preparation of theabove-described powder-based solid cosmetic composition, which includesmixing powder, a binder including a film-forming polymer having amodulus of elasticity not greater than 200 kg/cm² and a volatile solventand then solidifying the resulting mixture by volatilizing the volatilesolvent.

[0011] The present invention provides a powder-based solid cosmeticcomposition which has excellent skin feel upon use. More particularly,the composition of the present invention has a moisturized feeling, issmooth and permits easy release of powder from the molded product uponuse. In addition, the composition of the present invention is free fromcracks and is not easily broken by an external force. The powder-basedsolid cosmetic composition of the present invention is particularlysuitable as make-up or a cosmetic such as foundation, face powder, cheekrouge or eye shadow.

BRIEF DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] Various other objects, features and attendant advantages of thepresent invention will be more fully appreciated as the same becomesbetter understood from the following detailed description, which isgiven for illustration of the invention and is not intended to belimiting unless otherwise specified.

[0013] Preferably, from the viewpoint of the feeling upon use andcracks, the powder-based solid cosmetic composition has a hardness notgreater than 75, particularly 10 to 75, and more particularly, 20 to 75,as measured by an “Asker rubber hardness meter type C1L” (trade name), aporosity of at least 0.4, particularly 0.45 to 0.7, and moreparticularly 0.5 to 0.65, and an impact resistance (as defined below) ofat least 5, particularly at least 7, and more particularly at least 8.Among said powder based solid cosmetic compositions are included afoundation having a hardness of 10 to 70, particularly 10 to 65, and aneye shadow having a hardness of 30 to 75, particularly 50 to 75.

[0014] The hardness of the molded product is measured directly by anAsker rubber hardness tester type C1L. In the below-describedpreparation examples, the hardness was measured using a sample which hadbeen filled in an aluminum pan having a diameter of 54 mm and depth of 4mm, molded and then dried. The porosity was determined in accordancewith the below-described equation based on the measuring results of theweight and volume of the molded product and true density of the powder.${Porosity} = {1 - {\frac{{Weight}\quad {of}\quad {molded}\quad {product}}{{True}\quad {density}\quad {of}\quad {the}\quad {powder}} \times \frac{1}{{Volume}\quad {of}\quad {molded}\quad {produc}}}}$

[0015] In the above formula, the term “molded product” means a cosmeticcomposition after molding and drying. True density of the powder wasmeasured using “Acupic Model 1330” (trade name: product of ShimadzuCorporation) for the powder mixture used.

[0016] Impact resistance was evaluated based on the number of droppingtimes until a crack appeared in the molded product when it wasrepeatedly dropped from a height of 50 cm onto a plywood board of 25 mmthick.

[0017] In the present invention, it has been found that a powder-basedsolid cosmetic composition satisfying the above-described conditionsexhibits desired performances, the powder-based solid cosmeticcomposition preferably comprising powder and a film-forming polymerhaving a modulus of elasticity preferably not greater than 200 kg/cm².

[0018] The film-forming polymer to be used in the present inventionpreferably has a modulus of elasticity not greater than 200 kg/cm², with1 to 100 kg/cm² being particularly preferred and with 5 to 75 kg/cm²being most particularly preferred. When the modulus of elasticityexceeds 200 kg/cm², the product is inferior in softness or smoothness,leading to a deterioration in the feeling upon use.

[0019] In the present invention, the modulus of elasticity was measuredas follows:

[0020] A 10 wt. % solution or dispersion of each film-forming polymerwas weighed in a Teflon Petri dish having a diameter of 5 cm, andnaturally dried for 5 to 10 days. The film so obtained (having athickness of 0.3 to 0.5 mm) was cut into strips 15 mm long and 5 mm wideand each was used as a sample for the measurement. After allowing asample to stand at 25° C. and relative humidity of 30% for at least 24hours, the sample was fixed to a tensile test jig of a dynamicviscoelasticity measuring apparatus (“Rheospectra DVE-V4” trade name;product of UBM) and measured at an oscillation frequency of 10 Hz and anamplitude of 10 μm.

[0021] Preferably, film-forming polymers satisfying the above-describedrequirement for the modulus of elasticity have a molecular weight ofabout 10,000 to 1,000,000, more preferably, 15,000 to 900,000, and mostpreferably, 20,000 to 800,000. Preferred examples include vinyl polymersobtained by the polymerization of at least one monomer having apolymerizable double bond, poly(N-acylalkyleneimine)modified silicones(Japanese Patent Application Laid-Open No. Hei 5-112423, Hei 7-133352and Hei 10-95705, the entire contents of each of which are herebyincorporated by reference) and vinyl silicone block polymers (JapanesePatent Application Laid-Open No. Hei 11-100307, the entire contents ofwhich are hereby incorporated by reference). Preferred examples ofmonomers having a polymerizable double bond include ethylenicallyunsaturated carboxylic acids such as acrylic acid, methacrylic acid,maleic acid and fumaric acid; unsaturated carboxylic esters such ashydroxyethyl (meth)acrylate and polyethylene glycol mono(meth)acrylate;unsaturated carboxylic amides such as (meth)acrylamide andN-diacetonacrylamide; amino-containing unsaturated carboxylic esters andsalts thereof such as aminoethyl (meth)acrylate, N,N-dimethylaminoethyl(meth)acrylate, N,N-diethylamlnoethyl (meth)acrylate andN,N,N-trimethylaminoethyl (meth)acrylate: aromatic vinyl compounds suchas styrene, α-methylstyrene, chlorostyrene and alkylstyrene; acrylicesters and methacrylic esters such as methyl (meth)acrylate, ethyl(meth)acrylate, propyl (meth)acrylate, butyl (meth)acrylate,2-ethylhexyl (meth)acrylate, t-butyl (meth)acrylate and cyclohexyl(meth)acrylate; vinyl cyanide compounds such as acrylonitrile andmethacrylonitrile; vinyl esters such as vinyl acetate; vinyl halidessuch as vinyl chloride and vinylidene chloride; fluorine monomers suchas trifluoroethylmethacrylate, 2,2,3,3-tetrafluoropropylmethacrylate,2,2,3,3,4,4-hexafluorobutylmethacrylate, perfluorooctylmethacrylate andperfluorooctylacrylate; and silicone macromonomers, represented by thefollowing formulas (1) to (5).

[0022] wherein R¹ represents a hydrogen atom or a methyl group, R² toR¹⁰ each independently represents a C₁-C₆ alkyl group, C₁-C₆ alkoxygroup or a phenyl group, and n stands for 1 to 500.

[0023] As the poly(N-acylalkyleneimine)modified silicone, preferred arethose which include a poly(N-acylalkyleneimine) segment composed ofrecurring units each represented by the following formula (6):

[0024] wherein R¹¹ represents a hydrogen atom, an alkyl group, acycloalkyl group, an aralkyl group or an aryl group, each having 1 to 22carbon atoms, and m stands for 2 or 3; and an organopolysiloxane segmenthaving, at an end thereof or as a side chain, thepoly(N-acylalkyleneimine) segment composed of the recurring units of theabove-described formula (6) bonded through a hetero-atom-containingalkylene group, and contains the poly(N-acylalkyleneimine) segment andorganopolysilaxane segment at a weight ratio ranging from 1:50 to 20:1and has a molecular weight of 10,000 to 500,000, particularly 50,000 to300,000.

[0025] A preferred example of the vinyl-silicone block polymer has, asstructural units, a silicone polymer unit represented by the followingformula (7):

[0026] wherein R¹², R¹³, R¹⁴ and R¹⁵ are the same or different and eachindependently represents a hydrogen atom, a C₁-C₆ alkyl group or anitrile group, R¹⁶, R¹⁷, R¹⁸ and R¹⁹ are the same or different and eachindependently represents a hydrogen atom, an alkyl group or an arylgroup which may be substituted by a halogen atom, Y represents a linearor branched, saturated or unsaturated C₁-C₁₀ hydrocarbon group which maybe substituted by a halogen atom, A represents a —CONH— group or a —COO—group and B represents a —NHCO— group or a —OCO— group, provided thatwhen A represents a —CONH— group, B is a —NHCO— group, and wherein whenA represents a —COO— group, B is a —OCO— group, q stands for 0 to 200, pstands for 0 to 6 and a stands for 2 to 300, and a vinyl monomer unitcontaining no fluorine atom; the total number of silicone monomersconstituting the silicone polymer unit of formula (7) preferably fallingwithin a range of from 5 to 10⁶, the total number of the vinyl monomerunits preferably falling within a range of from 10 to 10⁶, the sum ofthe silicon monomers arid the vinyl monomers preferably falling within arange of from 10² to 10⁶, and a ratio of the total number of thesilicone monomers to the total number of the vinyl monomers fallingwithin a range of from 1/99 to 99/1.

[0027] In the present invention, at least one of the above-exemplifiedfilm-forming polymers is preferably used. The film-forming polymer ispreferably added in an amount of 0.1 to 15 wt. % based on the wholecomposition, with 0.5 to 10 wt. % being particularly preferred arid 1 to8 wt % being more preferred.

[0028] There is no particular limitation imposed on the powder to beused in the present invention insofar as it is an extender pigment orcolor pigment ordinarily employed for a cosmetic compositions. Preferredexamples include inorganic powder such as silicic acid, silicicanhydride, magnesium silicate, talc, sericite, mica, kaolin, red ironoxide, clay, bentonite, titanium-coated mica, bismuth oxychloride,zirconium oxide, magnesium oxide, zinc oxide, aluminum oxide, calciumsulfate, barium sulfate, magnesium sulfate, calcium carbonate, magnesiumcarbonate, iron oxide, ultramarine blue, chromium oxide, chromiumhydroxide, calamine and carbon black and complexes thereof; organicpowder such as polyamide, polyester, polypropylene, polystyrene,polyurethane, vinyl resin, urea resin, phenol resin, fluorine resin,silicon resin, acrylic resin, melamine resin, epoxy resin, polycarbonateresin, divinyl

enzene styrene copolymer, silk powder, cellulose, metal salt of along-chain alkyl phosphoric acid and N-mono (long-chain alkyl)acyl basicamino acid, and mixtures and/or complexes thereof; and complexes of theabove-exemplified inorganic powder and organic powder.

[0029] Preferably, as the powder to be used in the present invention,the above-exemplified ones originally having a hydrophobic surface orhaving a surface subjected to hydrophobizing treatment can be employedand such powders are preferred because they impart the resultingcomposition with an improved feeling upon use.

[0030] The hydrophobization is preferably conducted using ahydrophobizing agent such as silicone oil, metal salt of fatty acid,alkyl phosphoric acid, alkaline metal salt or amine salt of an alkylphosphoric acid, N-mono-long-chain (8 to 22 carbon atoms) aliphatic acylbasic amino acid or perfluoroalkyl-containing fluorine compound.

[0031] There is no particular limitation on the hydrophobizing method ofpowder. It may be carried out in a conventional manner. The amount ofthe hydrophobizing agent is preferably 0.05 to 20 wt. %, and morepreferably 2 to 10 wt. % based on the amount of the powder.

[0032] As the powder, at least one of the above-exemplified powders canbe employed and it is preferably added in an amount of 55 to 99.9 wt. %based on the whole composition, with 65 to 99.9 wt. % being particularlypreferred and with 75 to 99.9 wt. % being more preferred.

[0033] To the powder-based solid composition of the present invention,an oil component can be preferably added in addition to theabove-described components. The oil component is preferably addedbecause it brings about an improvement in a moisturized feeling oradhesion to the skin. Preferable examples of the oil component includesolid or semi-solid oils such as Vaseline, lanolin, ceresin,microcrystalline wax, carnauba wax, candelilla wax, higher fatty acidand higher alcohol; fluid oils such as squalane, liquid paraffin, esteroil, diglyceride, triglyceride and silicone oil; and fluorine oilcomponent such as perfluoropolyether, perfluorodecalin andperfluorooctane.

[0034] At least one oil component is preferably used, but mixtures oftwo or more oil components may also be used. The oil component ispreferably added in an amount up to about 30 wt. % based on the wholecomposition, with 20 wt. % or less being particularly preferred and with15 wt. % or less being more preferred.

[0035] Optionally added to the composition of the present invention area surfactant, antiseptic, antioxidant, coloring matter, thickener, pHregulator, perfume, ultraviolet absorber, humectant, blood circulationaccelerator, cooling touch imparting agent, antiperspirant, sterilizerand skin activating agent to any extent so long as the advantages of thepresent invention are not impaired.

[0036] The powder-based solid cosmetic composition of the presentinvention is preferably prepared, for example, by mixing the powder, afilm-forming polymer having a modulus of elasticity not greater than 200kg/cm² and a volatile solvent, and then solidifying the resultingmixture by evaporating the volatile solvent.

[0037] Preferred examples of the volatile solvent include water,low-boiling point alcohols such as ethanol and isopropyl alcohol,hexane, isoparaffin, acetone, ethyl acetate and volatile silicone oiland mixtures thereof. Water and an aqueous solution of an alcohol areparticularly preferred.

[0038] Upon mixing the powder, film-forming polymer and volatilesolvent, it is preferred to add the powder in an amount of 40 to 94.9wt. %, particularly 50 to 94.4 wt. % the film-forming polymer in anaccount of 0.1 to 14 wt. % particular 0.5 to 10 wt. % and the volatilesolvent in an amount of 5 to 40 wt. %. The mixture is in the form of aslightly wet powder when the volatile solvent is used in an amount of 5to 40 wt. %. When the amount of the volatile solvent exceeds 40 wt. %,the mixture is in the form of a “slurry” as described in Japanese PatentApplication Laid-Open No. Sho 56-108703. In this case, a large amount ofthe solvent in the slurry is volatilized upon drying and a shrinkage ofthe solid content, a decrease in the porosity and hardening of themolded product occur, which may presumably causes a problem of cracks.Amounts exceeding the above range are therefore not preferred.

[0039] The powder-based solid cosmetic composition of the invention ispreferably prepared by filling the mixture of the powder, film-formingpolymer and volatile solvent into a container, subjecting it tocompression molding and then volatilizing the solvent under suitableconditions (temperature, pressure and time). The conditions forcompression molding and solvent volatilization can each be determined asneeded, depending on the kind, size and shape of the intendedpowder-based solid cosmetic composition.

EXAMPLES

[0040] Having generally described this invention, a furtherunderstanding can be obtained by reference to certain specific examples,which are provided herein for purposes of illustration only and are notintended to be limiting unless otherwise specified.

Preparation Example 1

[0041] In a reaction vessel, 150 parts of water, 3 parts of sodiumlaurylsulfate and 0. 5 part of potassium persulfate were charged. Thevessel was purged with a nitrogen gas to remove dissolved oxygen. In adropping funnel, 17 parts of styrene, 33 parts of 2-ethylhexyl acrylateand 2.0 parts of n-dodecylmercaptane were charged. Under stirring, thereaction vessel was heated to 70° C., and the monomers were addeddropwise from the dropping funnel over 3 hours. Then the temperature waskept for further 3 hours, followed by removal of the aggregate, wherebyan alkyl acrylate copolymer emulsion having a solid content of 45 wt. %was obtained. The emulsion was diluted with water into an emulsionhaving a solid content of 12 wt. %.

Preparation Example 2

[0042] In a reaction vessel, 5 parts of methacrylic acid, 22 parts ofmethyl methacrylate, 33 parts of n-butyl acrylate, 40 parts of amacroazo polymerization initiator (“VPS0501”, trade name; product ofWako Pure Chemical Industries, Ltd., average molecular weight: 30 to 40thousand) having a polydimethylsiloxane structure, and 200 parts ofmethyl ethyl ketone were charged. Under stirring at room temperature,the vessel was purged with a nitrogen gas for about one hour, wherebydissolved oxygen was removed. Under stirring the reaction vessel washeated to 80° C., followed by polymerization for 6 hours and furtherheating for 2 hours at 85° C., whereby a transparent viscous solutionwas obtained. The resulting solution was diluted with 100 parts ofmethyl ethyl ketone, neutralized with 5 parts of lN-NaOH and then addedwith 600 parts of deionized water. Methyl ethyl ketone was distilled offunder reduced pressure. The residue was diluted with deionized waterinto an emulsion having a solid content of 12 wt. %.

Example 1

[0043] A powder-based solid foundation having a composition as shown inTable 1 was produced.

[0044] (Preparation Process)

[0045] After the powdery components were mixed in a Henschel mixer, theoil component (dimethylpolysiloxane) was added to the resulting mixture.Then, the film-forming polymer was added, followed by mixing.

[0046] The resulting mixture was filled in a pan, press-molded and thendried, whereby the powder-based solid foundation was obtained.

[0047] The softness, smoothness and release of powders from the moldedproduct were evaluated according to the below-described standards. Theimpact resistance was evaluated by the number of the dropping timesuntil abnormalities such as cracks appeared when the composition, whichhad been filled in a pan having a diameter of 54 mm and depth of 4 mm,press-molded under a pressure of 3 kg/cm² and dried at 50° C. and normalpressure for 3 hours, was dropped repeatedly from a height of 50 cm ontoa plywood board of 25 mm thick. Results are shown together in Table 1.

[0048] (Evaluation Standards)

[0049] A: excellent

[0050] B: good

[0051] C: slightly inferior

[0052] D: inferior

[0053] Clearly, the powder-based solid foundation of the presentinvention has excellent impact resistance and provides superior feelupon use, compared to the comparative products. TABLE 1 ComparativeComponent Invention products products (wt. %) 1 2 3 4 5 6 1 2 3 Micatreated with silicone 25.0 25.0 — — — 20.0 25.0 25.0 45.0 (averageparticle size: 15 μm) Mica treated with silicone — — 60.0 — 60.0 — — — —(average particle size: 19 μm) Talc treated with silicone 25.0 20.0 —30.0 — 20.0 20.0 25.0 30.0 (average particle size: 10 μm) Mica treatedwith fluorine — — — 30.0 — — — — — (average particle size: 19 μm)Spherical silicone resin 10.0 10.0 — — — 15.0 10.0 10.0 10.0 (averageparticle size: 12 μm) Spherical silicone resin — — — 12.0 — — — — —(average particle size: 4.5 μm) Spherical PMMA resin powder — — 10.0 — —— — — — (average particle size: 12 μm) Titanium oxide treated with 5.05.0 5.0 5.0 5.0 5.0 5.0 5.0 5.0 silicone Coloring pigment treated with3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 silicone Dimethylpolysiloxane 7.07.0 3.0 — 2.0 7.0 7.0 7.0 7.0 12 wt. % aqueous dispersion of 25.0 — 20.020.0 — — — — — poly(N-acylalkyleneimine)- modified silicone*1(modulus ofelasticity: 5.3 kg/cm²) 12 wt. % aqueous dispersed — 30.0 — — 30.0 — — —— emulsion of alkyl acrylate copolymer of Prep. Ex. 1 (modulus ofelasticity: 50 kg/cm²) 12 wt. % aqueous dispersed — — — — — 25.0 — — —emulsion of vinyl silicone block polymer of Prep. Ex. 2 (modulus ofelasticity: 5.9 kg/cm²) 12 wt. % aqueous dispersed — — — — — — 30.0 — —emulsion of alkyl acrylate copolymer*2 (modulus of elasticity: 255kg/cm²) Purified water — — — — — — — 25.0 — Press molding pressure(kg/cm²) 2.0 1.0 3.0 5.0 2.0 2.5 1.0 5.0 900.0 Hardness 44.0 46.5 34.046.2 18.0 41.0 72.0 21.0 88.0 Porosity 0.57 0.49 0.56 0.52 0.67 0.530.40 0.52 0.36 Impact resistance 10 15 12 20 20 18 10 1 5 Softness A B BA A A D D D Smoothness A B B B B B D C C Easy release of powder from A BB A A B D B B molded product

Example 2

[0054] A powder-based solid eye shadow having a composition as shown inTable 2 was produced.

[0055] (Preparation process)

[0056] The same preparation process as that of Example 1 was performedusing 12 wt. % aqueous dispersion of poly(N-acylalkileneimine) modifiedsilicone. Results are shown in Table 2.

[0057] Clearly, the powder-based eye shadow of the present invention hasexcellent impact resistance and provides superior feel upon use,compared to the comparative product. TABLE 2 Component InventionComparative (wt. %) product 7 product 4 Mica treated with silicone 15.015.0 (average particle size:15 μm) Talc treated with silicone 15.9115.91 (average particle size:6 μm) Nylon powder(average particle 5.0 5.0size:5 μm) Zinc stearate 5.0 5.0 Paraben 0.1 0.1 Red 202 0.01 0.01Yellow 401 0.2 0.2 Blue 404 0.4 0.4 Black iron oxide 0.03 0.03 Titaniumoxide 0.05 0.05 Mica titanium 40.0 40.0 Bees wax 2.0 2.0 Squalane 3.03.0 2-ethylhexyl palmitate 3.0 3.0 Dimethylpolysiloxane 2.0 2.0Poly(N-acylalkylneimine)- 8.3 — modified silicone Purified water — 8.3Press molding pressure (kg/cm²) 200 200 Hardness 72 71 Porosity 0.4230.350 Impact resistance 14 4

[0058] Obviously, numerous modifications and variations of the presentinvention are possible in light of the above teachings. It is thereforeto be understood that within the scope of the appended claims, theinvention may be practiced otherwise than as specifically describedherein.

[0059] This application is based on Japanese patent application10-186199, filed Jul. 1, 1998, the entire contents of which are herebyincorporated by reference.

1. A powder-based solid cosmetic composition, having: a hardness notgreater than 75 as measured by an Asker rubber-hardness tester type C1L;a porosity of at least 0.4; and an impact resistance of at least 5,wherein the impact resistance is defined as the number of dropping timesuntil a crack appears in a molded product of said composition when amolded product of said composition is repeatedly dropped from a heightof 50 cm onto a plywood board of 25 mm thick.
 2. The compositionaccording to claim 1, which comprises powder and a film forming polymerhaving a modulus of elasticity not greater than 200 kg/cm².
 3. Thecomposition according to claim 2, wherein the film-forming polymer has amodulus of elasticity of 1 to 100 kg/cm².
 4. The composition accordingto claim 2, wherein the film-forming polymer is a polymer selected fromthe group consisting of a vinyl polymer, a poly(N-acylalkyleneimine)modified silicone, and a vinyl silicone block polymer.
 5. Thecomposition according to claim 4, wherein the vinyl polymer is obtainedby polymerizing at least one monomer selected from the group consistingof ethylenically unsaturated carboxylic acids, acrylic acid, methacrylicacid, maleic acid and fumaric acid; unsaturated carboxylic esters,hydroxyethyl (meth)acrylate and polyethylene glycol mono(meth)acrylate;unsaturated carboxylic amides, (meth)acrylamide andN-diacetonacrylamide; amino-containing unsaturated carboxylic esters andsalts thereof, aminoethyl (meth)acrylate, N,N-dimethylaminoethyl(meth)acrylate, N,N-diethylaminoethyl (meth)acrylate andN,N,N-trimethylaminoethyl (meth)acrylate: aromatic vinyl compounds,styrene, α-methylstyrene, chlorostyrene and alkylstyrene; acrylic estersand methacrylic esters, methyl (meth)acrylate, ethyl (meth)acrylate,propyl (meth)acrylate, butyl (meth)acrylate, 2-ethylhexyl(meth)acrylate, t-butyl (meth)acrylate and cyclohexyl (meth)acrylate;vinyl cyanide compounds, acrylonitrile and methacrylonitrile; vinylesters, vinyl acetate; vinyl halides, vinyl chloride and vinylidenechloride; fluorine monomers, trifluoroethylmethacrylate,2,2,3,3-tetrafluoropropylmethacrylate,2,2,3,3,4,4-hexafluorobutylmethacrylate, perfluorooctylmethacrylate andperfluorooctylacrylate; and silicon macromonomers, represented by thefollowing formulas (1) to (5):

wherein R¹ represents a hydrogen atom or a methyl group, R² to R¹⁰ eachindependently represents a lower alkyl group, lower alkoxy group or aphenyl group, and n stands for 1 to 500, and mixtures thereof.
 6. Thecomposition according to claim 4, wherein thepoly(N-acylalkyleneimine)modified silicone comprises apoly(N-acylalkyleneimine) segment comprising recurring units eachrepresented by the following formula (6):

wherein R¹¹ represents a hydrogen atom, an alkyl group, a cycloalkylgroup, an aralkyl group or an aryl group, each having 1 to 22 carbonatoms, and m stands for 2 or 3; and an organopolysiloxane segmenthaving, at an end thereof or as a side chain, saidpoly(N-acylalkyleneimine) segment composed of the recurring units of theabove-described formula (6) bonded through a hetero-atom-containingalkylene group.
 7. The composition according to claim 6, wherein saidpoly(N-acylalkyleneimine) segment and said organopolysilaxane segmentare present in a weight ratio ranging from 1:50 to 20:1.
 8. Thecomposition according to claim 4, wherein said vinyl-silicone blockpolymer comprises, as structural units: a silicone polymer unitrepresented by the following formula (7)

wherein R¹², R¹³, R¹⁴ and R¹⁵ are the same or different and eachindependently represents a hydrogen atom, a lower alkyl group or anitrile group, R¹⁶, R¹⁷, R¹⁸ and R¹⁹ are the same or different and eachindependently represents a hydrogen atom, an alkyl group or an arylgroup which may be substituted by a halogen atom, Y represents a linearor branched, saturated or unsaturated C₁-C₁₀ hydrocarbon group which maybe substituted by a halogen atom, A represents a —CONH— group or a —COO—group and B represents a —NHCO— group or a —OCO— group, provided thatwhen A represents a —CONH— group, B is a —NHCO— group, and wherein whenA represents a —COO— group, B is a —OCO— group, q stands for 0 to 200, pstands for 0 to 6 and a stands for 2 to 300; and a vinyl monomer unitcontaining no fluorine atom.
 9. The composition according to claim 8,wherein the total number of silicone monomers constituting the siliconepolymer unit of formula (7) is within a range of from 5 to 10⁶.
 10. Thecomposition according to claim 8, wherein a ratio of the total number ofthe silicone monomers to the total number of the vinyl monomers iswithin a range of from 1/99 to 99/1.
 11. The composition according toclaim 4, wherein the film-forming polymer is present in an amount of 0.1to 15 wt. % based on the weight of the composition.
 12. The compositionaccording to claim 2, wherein the powder is selected from the groupconsisting of inorganic powder, silicic acid, silicic anhydride,magnesium silicate, talc, sericite, mica, kaolin, red iron oxide, clay,bentonite, titanium-coated mica, bismuth oxychloride, zirconium oxide,magnesium oxide, zinc oxide, aluminum oxide, calcium sulfate, bariumsulfate, magnesium sulfate, calcium carbonate, magnesium carbonate, ironoxide, ultramarine blue, chromium oxide, chromium hydroxide, calamineand carbon black, and mixtures and complexes thereof; organic powder,polyamide, polyester, polypropylene, polystyrene, polyurethane, vinylresin, urea resin, phenol resin, fluorine resin, silicon resin, acrylicresin, melamine resin, epoxy resin, polycarbonate resin, divinylbenzenestyrene copolymer, silk powder, cellulose, metal salt of a long-chainalkyl phosphoric acid and N-mono(long-chain alkyl)acyl basic amino acid,and mixtures and complexes thereof; and mixtures and complexes of theinorganic powder and organic powder.
 13. A process for preparing apowder-based solid cosmetic composition, having: a hardness not greaterthan 75 as measured by an Asker rubber-hardness tester type C1L; aporosity of at least 0.4; and an impact resistance of at least 5,wherein the impact resistance is defined as the number of dropping timesuntil a crack appears in a molded product of said composition when amolded product of said composition is repeatedly dropped from a heightof 50 cm onto a plywood board of 25 mm thick; the process comprising:mixing powder, a film-forming polymer having a modulus of elasticity notgreater than 200 kg/cm² and a volatile solvent to obtain a mixture; andthen molding the mixture by volatilizing the volatile solvent.
 14. Theprocess according to claim 13, wherein the powder, film-forming polymerand volatile solvent are mixed in amounts of 40 to 94.9 wt. %, 0.1 to 14wt. %, and 5 to 40 wt. %, respectively.
 15. The process according toclaim 13, wherein the film forming polymer comprises a modulus ofelasticity not greater than 200 kg/cm².
 16. The process according toclaim 13, wherein the film-forming polymer has a modulus of elasticityof 1 to 100 kg/cm².
 17. The process according to claim 13, wherein thefilm-forming polymer is a polymer selected from the group consisting ofa vinyl polymer, a poly(N-acylalkyleneimine) modified silicone, and avinyl silicone block polymer.
 18. The process according to claim 17,wherein the vinyl polymer is obtained by polymerizing at least onemonomer selected from the group consisting of ethylenically unsaturatedcarboxylic acids, acrylic acid, methacrylic acid, maleic acid andfumaric acid; unsaturated carboxylic esters, hydroxyethyl (meth)acrylateand polyethylene glycol mono(meth)acrylate; unsaturated carboxylicamides, (meth)acrylamide and N-diacetonacrylamide; amino-containingunsaturated carboxylic esters and salts thereof, aminoethyl(meth)acrylate, N,N-dimethylaminoethyl (meth)acrylate,N,N-diethylaminoethyl (meth)acrylate and N,N,N-trimethylaminoethyl(meth)acrylate; aromatic vinyl compounds, styrene, α-methylstyrene,chlorostyrene and alkylstyrene; acrylic esters and methacrylic esters,methyl (meth)acrylate, ethyl (meth)acrylate, propyl (meth)acrylate,butyl (meth)acrylate, 2-ethylhexyl (meth)acrylate, t-butyl(meth)acrylate and cyclohexyl (meth)acrylate; vinyl cyanide compounds,acrylonitrile and methacrylonitrile; vinyl esters, vinyl acetate; vinylhalides, vinyl chloride and vinylidene chloride; fluorine monomers,trifluoroethylmethacrylate, 2,2,3,3-tetrafluoropropylmethacrylate,2,2,3,3,4,4-hexafluorobutylmethacrylate, perfluorooctylmethacrylate andperfluorooctylacrylate; and silicone macromonomers, represented by thefollowing formulas (1) to (5):

wherein R¹ represents a hydrogen atom or a methyl group, R² to R¹⁰ eachindependently represents a lower alkyl group, lower alkoxy group or aphenyl group, and n stands for 1 to 500, and mixtures thereof.
 19. Theprocess according to claim 17, wherein thepoly(N-acylalkyleneimine)modified silicone comprises apoly(N-acylalkyleneimine) segment comprising recurring units eachrepresented by the following formula (6):

wherein R¹¹ represents a hydrogen atom, an alkyl group, a cycloalkylgroup, an aralkyl group or an aryl group, each having 1 to 22 carbonatoms, and m stands for 2 or 3; and an organopolysiloxane segmenthaving, at an end thereof or as a side chain, saidpoly(N-acylalkyleneimine) segment composed of the recurring units of theabove-described formula (6) bonded through a hetero-atom-containingalkylene group.
 20. The process according to claim 17, wherein saidvinyl-silicone block polymer comprises, as structural units: a siliconepolymer unit represented by the following formula (7):

wherein R¹², R¹³, R¹⁴ and R¹⁵ are the same or different and eachindependently represents a hydrogen atom, a lower alkyl group or anitrile group, R¹⁶, R¹⁷, R¹⁸ and R¹⁹ are the same or different and eachindependently represents a hydrogen atom, an alkyl group or an arylgroup which may be substituted by a halogen atom, Y represents a linearor branched, saturated or unsaturated C₁-C₁₀ hydrocarbon group which maybe substituted by a halogen atom, A represents a —CONH— group or a —COO—group and B represents a —NHCO— group or a —OCO— group, provided thatwhen A represents a —CONH— group, B is a —NHCO— group, and wherein whenA represents a —COO— group, B is a —OCO— group, q stands for 0 to 200, pstands for 0 to 6 and a stands for 2 to 300; and a vinyl monomer unitcontaining no fluorine atom.